10 1 1 1 1 1 1 1 20 0.9 0.890 0.875 0.85 0.80 0.75 0.7 30 0.715 0.7 0.675 0.65 0.6125 0.575 0.55 40 0.65 0.62 0.6 0.575 0.55 0.515 0.49 50 0.60 0.575 0.55 0.525 0.50 0.475 0.45 60 0.575 0.54 0.51 0.4875 0.4625 0.4375 0.425